IAA RAS IAA Minor Planet Database

12538 (1998 OH)

NEO PHA MOID ⇩ IMP ⇩ COV ★ EPH ⇩ OBS ⇩ Radar ⇩ Gaia
Orbital Elements
Epoch (TDB)2025-11-21 (JD 2461000.5)
Eccentricity (e)0.4059016556 ± 4.35e-09
Semi-major axis (a)1.5415724184 AU ± 7.25e-10
Inclination (i)24.53563599° ± 8.41e-07
Long. of Asc. Node (Ω)220.68792372° ± 1.75e-06
Arg. of Perihelion (ω)321.78911043° ± 1.84e-06
Mean Anomaly (M)163.00612547° ± 9.55e-07
Mean Motion (n)0.5149515611°/day ± 3.63e-10
Perihelion dist (q)0.91584562 AU ± 6.72e-09
Aphelion dist (Q)2.16729922 AU ± 6.78e-09
Orbital Period1.91401747 yr ± 1.35e-09
Physical Parameters
H (abs. magnitude)15.96
G (slope)0.15
Orbit Solution
SourceIAA
Solution Date2026-05-31
RMS Residual0.272″
Uncertainty0
Orbit TypeApollo
MOID0.029256 AU
Observations Used10512
Radar Obs Used1
Gaia Obs Used113
Oppositions14
Arc Total1987-2025
First Observation Used1987-08-22
Last Observation Used2025-12-01
Observations (19002)
Date Type RA Dec Mag Band Observatory
2021-01-11 04:54:08 s 1 -192294.95 1 +216948.78 5330.0 – C57
2021-01-11 05:14:08 S 06 34 37.274 -61 28 26.11 – V C57
2021-01-11 05:14:08 s 1 -192435.76 7 +215717.68 9270.0 – C57
2021-01-11 06:54:08 S 06 34 27.972 -61 31 32.77 – V C57
2021-01-11 06:54:08 s 1 -193071.69 5 +209487.38 6040.0 – C57
2021-01-11 07:04:08 S 06 34 27.149 -61 31 51.38 – V C57
2021-01-11 07:04:08 s 1 -193128.91 4 +208857.45 6150.0 – C57
2021-01-11 07:14:08 S 06 34 26.357 -61 32 08.59 – V C57
2021-01-11 07:14:08 s 1 -193184.95 3 +208226.26 4300.0 – C57
2021-01-11 07:24:08 S 06 34 25.190 -61 32 28.00 – V C57
2021-01-11 07:24:08 s 1 -193239.80 5 +207593.81 480.0 – C57
2021-01-11 07:34:08 S 06 34 24.422 -61 32 45.89 – V C57
2021-01-11 07:34:08 s 1 -193293.46 6 +206960.09 4680.0 – C57
2021-01-11 07:44:08 S 06 34 23.633 -61 33 03.42 – V C57
2021-01-11 07:44:08 s 1 -193345.93 0 +206325.10 6890.0 – C57
2021-01-11 07:54:08 S 06 34 22.649 -61 33 21.96 – V C57
2021-01-11 07:54:08 s 1 -193397.19 0 +205688.85 7110.0 – C57
2021-01-11 08:04:08 S 06 34 21.734 -61 33 40.64 – V C57
2021-01-11 08:04:08 s 1 -193447.24 2 +205051.33 5320.0 – C57
2021-01-11 08:14:08 S 06 34 21.055 -61 33 58.43 – V C57
2021-01-11 08:14:08 s 1 -193496.07 9 +204412.53 1510.0 – C57
2021-01-11 08:24:08 S 06 34 20.057 -61 34 16.72 – V C57
2021-01-11 08:24:08 s 1 -193543.69 6 +203772.46 5670.0 – C57
2021-01-11 08:34:08 S 06 34 19.130 -61 34 34.90 – V C57
2021-01-11 08:34:08 s 1 -193590.08 7 +203131.11 7790.0 – C57
2021-01-11 08:44:08 S 06 34 18.271 -61 34 53.18 – V C57
2021-01-11 08:44:08 s 1 -193635.24 6 +202488.49 7870.0 – C57
2021-01-11 08:54:08 S 06 34 17.359 -61 35 11.65 – V C57
2021-01-11 08:54:08 s 1 -193679.16 7 +201844.59 5890.0 – C57
2021-01-11 09:04:08 S 06 34 16.546 -61 35 29.11 – V C57
2021-01-11 09:04:08 s 1 -193721.84 4 +201199.40 1840.0 – C57
2021-01-11 09:14:08 S 06 34 15.458 -61 35 48.05 – V C57
2021-01-11 09:14:08 s 1 -193763.27 2 +200552.94 5710.0 – C57
2021-01-11 09:24:08 S 06 34 14.686 -61 36 05.18 – V C57
2021-01-11 09:24:08 s 1 -193803.44 3 +199905.18 7490.0 – C57
2021-01-11 09:34:08 S 06 34 13.858 -61 36 24.37 – V C57
2021-01-11 09:34:08 s 1 -193842.35 2 +199256.14 7170.0 – C57
2021-01-11 09:44:08 S 06 34 12.792 -61 36 41.22 – V C57
2021-01-11 09:44:08 s 1 -193879.99 4 +198605.82 4750.0 – C57
2021-01-11 09:54:08 S 06 34 11.890 -61 37 00.16 – V C57
2021-01-11 09:54:08 s 1 -193916.36 1 +197954.20 200.0 – C57
2021-01-11 10:04:08 S 06 34 11.381 -61 37 17.69 – V C57
2021-01-11 10:04:08 s 1 -193951.44 7 +197301.29 3520.0 – C57
2021-01-11 10:14:08 S 06 34 10.421 -61 37 36.05 – V C57
2021-01-11 10:14:08 s 1 -193985.24 7 +196647.08 4690.0 – C57
2021-01-11 10:24:08 S 06 34 09.410 -61 37 54.26 – V C57
2021-01-11 10:24:08 s 1 -194017.75 3 +195991.58 3720.0 – C57
2021-01-11 10:34:08 S 06 34 08.599 -61 38 12.41 – V C57
2021-01-11 10:34:08 s 1 -194048.96 0 +195334.79 580.0 – C57
2021-01-11 10:44:08 S 06 34 07.661 -61 38 30.62 – V C57
Radar Observations (1)
Epoch (UTC)ValueSigmaUnitsFreq (MHz)ReceiverTransmitter
2019-05-14 21:19:00 24772.1678 4 Hz 2380 -1 -1
Station codes
-1 Arecibo (305-m, 1963–2020)